But there's no reason to question her honesty - she really believes the stories she tells.

Art,

1) The hypothesis that she really believes that I was banned for "bad behavior" predicts that she will point to evidence of the behavior that she judged to be bad. We may not agree with her conclusion, but she shouldn't be reticent.

2) The hypothesis that she doesn't really believe that I was banned for "bad behavior" predicts that she won't point to any evidence, and continue to make vague accusations.